Which key(s) do I need to press to display the heart symbol I see so much?

Answer 1

Press and hold Alt and press 3 for ♥
Press and hold Alt and press 4 for ♦
Press and hold Alt and press 5 for ♣
Press and hold Alt and press 6 for ♠
I hope it helps u in learning now
http://www.bbsinc.com/symbol.html
http://www.tedmontgomery.com/tutorial/ALTchrc.html
http://www.theworldofstuff.com/characters/#shapesshading
To learn more visit the above pages.

Answer 2

9&SHIFT at the same time